单数句变复数句的问题this is his case.变复数句后本该为：these are their cases.但是有的学生却是这样写的：these are his cases.人称代词不做变化对吗 但是他们刚上初一到底该怎么给他们说呢

单数句变复数句,复数句变单数句.It is a bus____________________ 单数句变复数句 的答案!变复数句与单数句 1 This is an apple. (变复数句) . 2 That’s a book. (变复数句) . 3 Those are English maps. (变单数句) . 4 It’s a watc 单数句变复数句,复数句变单数 this.is pen变复数句 单数句复数句 my father is a teacher.单数句变复数句，不好意思太匆忙了 英语单数句变复数句 单数句变复数句的问题this is his case.变复数句后本该为：these are their cases.但是有的学生却是这样写的：these are his cases.人称代词不做变化对吗 但是他们刚上初一到底该怎么给他们说呢 无聊ing..发个简单问题~第一个答对的采纳~把单数句变成复数句~This is a book.It is a desk.What's this?This is a foot.Is this a map?Yes,it is把复数句变成单数句~These are chair.They are apple.What are these in English?答 将下列单数句变复数句,复数句变单数句 单数句变复数句,复数句变单数句.We are boys. 单数句变复数句,复数句变单数句1He is his friend.2Those are boxes.3 These are desks. 请问单数句变复数句,句中的人称代词跟着变吗?例如：This is my friend,在变为复数句时,是These are my friends还是These are our friends? Is this his eraser 把这句单数句变成复数句 this is knife in the box（变复数句 Is this a pen?（变复数句） This is a pen变为复数句,怎么变 This is a horse.变该句为复数形式 this is a box.变复数句___________?